* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
ul,
ol {
  list-style: none;
}
a {
  text-decoration: none;
  color: black;
}
a:hover {
  color: #333;
}
.clearfix::after,
.clearfix::before {
  content: " ";
  line-height: 0;
  height: 0;
  display: block;
  visibility: hidden;
  clear: both;
}
.na {
  width: 100%;
  left: 0;
  right: 0;
}
.na li {
  text-align: center;
  height: 40px;
  line-height: 40px;
  border: 1px solid black;
  margin-bottom: 20px;
  font-size: 15px;
}
.na li:nth-child(1) {
  width: 25%;
  float: left;
}
.na li:nth-child(2) {
  width: 25%;
  float: left;
}
.na li:nth-child(3) {
  width: 49.9%;
  float: left;
}
.gong {
  left: 0;
  right: 0;
  text-align: center;
  color: orange;
  margin-bottom: 10px;
}
.gong a,
p {
  color: black;
  font-size: 15px;
}
.fl {
  float: left;
}
.fr {
  float: right;
  margin-right: 10px;
  font-size: 13px;
}
.shen {
  height: 70px;
  line-height: 70px;
  background-color: orange;
  width: 100%;
}
.shen a {
  line-height: 70px;
  margin-left: 5%;
  color: white;
  font-size: 25px;
}
.shen div {
  margin-left: 20%;
  font-size: 20px;
  font-weight: 900;
  color: white;
}
.shen img {
  width: 50px;
  margin-top: 10px;
  margin-right: 5%;
}
.main {
  margin-top: 20px;
}
.main div {
  text-align: center;
  padding: 10px;
  width: 50%;
  height: 300px;
}
.main div img {
  width: 80%;
}
.main div .lai {
  text-align: right;
  margin-top: 20px;
}
